The heavy (H-) and light (L-) chains of the immunoglobulin are encoded by multigenic loci on separate chromosomes.In different taxa of fish,the Ig genes are organized in different patterns.

• 免疫球蛋白重链和轻链是由不同染色体上的多基因座编码的，在鱼类的不同分类单元中具有不同的基因组织方式。